Rectifying means for printing mechanism



J y 11, 1939- M. GARBELL 2,165,923

L'RECTIFYING MEANS FOR PRINTING MECHANISM Filed April 2, 1936 26 34 ATTORNEY.

Patented July 11, 1939 RECTIFYING MEAN 8- FOR MECHANISM Max Garbell, Chicago, Ill., assignor to victor Adding Machine Company, Chicago, 111., a corporation of Illinois Application April 2, 1936, Serial No. 72,286

'7 Claims.

This invention relates to improvements in printing mechanism and is more particularly directed to means coacting with the individual printing members to rectify the same. when actuated to coact with a. platen.

l-lerletofore, various types of rectifying means forprinting units have been employed, which have been actuated by the operating mechanism of the machine .to be positioned to simultaneously guide all ofthe printing units at the same time. With this method, the rectifying means is actuated for all of the printing units including those which are not to be operated, and should a misalignment of one of the units with the rectifying means occur, .it would. disable the function of the rectifying means to effect the proper guiding of the remaining printing units to be actuated.

The present invention consists of individual elements arranged tobe bodily carried with each of the printing units for effecting an individual guide therefor or rectifying means as the units .are actuated. The individual elements are arranged to be carried with the printing. units and to coact with. a guide means therefor, which. serves to position the. elements as the printing units are moved preparatory to an impact with the platen. l Y

1 It is an object of the present invention to provide individual rectifying means arranged to be bodily carriedwith each of the printing units and adapted to be actuated to align and guide the unit when the same is *moved for animpact against the platen. 5 l

Another object is the provision of rectifying means carried on and arranged for movement with and independently of a printing unit thereby, 'upon the movement of said printing unit, the rectifying means will be carried therewith until arrested by a guide means, and at which time the printing unit will move in advance thereof to be engaged thereby and guide the unit for an impact againstthe platen.

, In the present invention, I have shown and described so much of the mechanism as will, in connection with the application for printing mechanism, filed December 28, 1935, Serial No. 56,465, afford a thorough understanding of the application thereto, and operation, of the present invention. a

In the accompanying drawing:

Figure 1 is a vertical partial sectional view of a printing mechanism, showing my improved rectifying means attached thereto.

Figure 2 is a detail perspective view illustrating one of the, printing units and the rectifying means Figure 3 is a side elevation of Figure 2, as viewed from the other side.

Figure 4 shows an exploded view in perspective of the rectifying means, printing unit and support there-for; and

- Figure 5 is a detail cross-sectional View taken on the line, 5-5 of Figure 2. I

The printing mechanism and rectifying means .5 is. illustrated as attached to an adding machine employing depressible keys I arranged in banks and having stems II that extend through the keyboard I2 and adapted to control a reciproeating rack i3 below each bank of keys.

The racks I3 are normally locked in position by means of a locking member I4 under the control of .the keys in each bank, and when released, each of the racks operates to position a printing .sector I5, having a seriesof type characters [6 thereon in printing relation with a platen P. Each rack has a link I"! pivotally connected thereto, which has its free end connected to an arm is of a spider I9, pivotally carried for rocking movements on a shaft 23, carried in the side .walls 2| of the machine. The spider I9 has an arm 22 to which a link 23 is pivotally connected, and which extends upwardly and is pivotally connected. at 24 to the sector I5, so that, upon a movement of the rack l3, the spider I9 will be, rocked by means of tht link I1 and carry the link 23 therewith to position the sector I5 in accordance with thedistance of movement of the rack I3 and position the type corresponding. with the key. depressed in printing position with platen The sector I5 is bodily carried for. pivotal move- .ments at 25 on a supporting arm 25 that is pivotally carried for rocking movements on a shaft 21, carried in the. side walls 2| of the machine.

The printing units are positioned in the printing line and actuated in the .same manner as shown and described in my pending application Serial No. 56,465, filed December 28, 1935.

The spider I9 controls; a rocker arm 28 that is pivotally carried on a. shaft 29, supported in the side walls 2| and is provided with a notched- I out portion 30 adapted to engage an ear 3! on an 1 extension 26a of the supporting arm 26. The arms 32 and the connecting links 33, (only one of: which is shown),. control the movements of,,45 the printing units for an impact against the platen P, under the control of the actuating mechanism (not shown).

. .A member 34 is adapted to be carried adjacent each of the sectors I5 and constitutes the rectigo fying means for the printing units and is the subiect matter of this invention. A

The member 34 is provided with an elongated slot opening 35 through which the pivotal pin 25 of the sector I5 extends and is provided at itst other end with a stud 36 that is adapted to extend through anarcuate slot opening 31 in the sector I5 and into an elongated slot opening 33 in the upper end of the supporting arm 23.

The arcuate slot opening 31 in the sector I5 permits of a free swinging movement of the sector and is provided with a plurality of recesses 39, each of which is aligned radially with a type character I6 thereon, adapted to be selectively engaged by the stud 36 as the printing unit is moved for an impact against the platen P. As each of the members forming the rectifying means, are arranged and constructed in the same manner, it is thought that a description and operation of one will suffice for a description of all.

Adjacent the pivot pin 25, the member 34 is provided with a projecting portion 34a that provides a heel portion 34b and a stop portion 340 thereon, adapted to be brought into engagement with a guide member 40, which also serves to guide the free end 261) of the supporting arms 26 for movement toward and from the platen.

As thus far described, it will be noted that the member 34 is normally retained with the heel 34b thereof in engagement with the guide member 40,

while the printing units are in their normal posi-' tions. While in this position, the stud 36 of the member 34 is aligned with the arcuate slot opening 31 in the sector l5, which permits of a free adjustment of the sector under control of the link 23 and spider l9, upon movement of the rack I3 to selectively position the type corresponding to the key depressed in printing position with the platen. As the printing unit is released for an impact against the platen, the member 34 will be carried therewith until the stop portion 340 engages the guide 40, which retains the same and permits the sector l5 and supporting arm 26 to move in advance thereof by means of the pivot pin 25 riding in the slot opening 35 and the slot opening 38. of the arm 26 riding over the stud 36., The movement of the sector I5. and supportingarm 26 in advance of the movement of the member 34, causes the recess 39, aligned with the selected type character of the sector I5, to straddle the stud 36 and guide the sector for an impact against the platen P. Upon the return movement of the supporting arm 26 and sector IS, the member 34 will be bodily carried therewith until the heel 34b thereof, engages the guide 40 and retains the same from further movement and at which time, the sector and arm will move rearwardly, causing the piovtal pin 25. to. slide in the slot opening 35 and the recess 39. to be carried away from the stud 36 until the return limit of movement has been reached and the pin 36 is a ain within the arcuate slot opening 31, permitting the sector ii to be restored, to its normal at-restfposition under the control of the link 23 and spider I9 by the restoring movement of the raclg I3.

It will be, noted, that the, engagement of the heel 34b and the stop portion 340 of the member 34 controls the engagement and disengagement of the stud 36 thereon. with. one of the recesses 39 of thesector I5, and it is the movement of the printing unit for an impact against the platen that controls the member 34 which forms rectifying means for the proper alignment of the selected type character thereon in. printing position with theplaten and therestoring movement of the printing unit controls the release of the member 34 with the recess 39 of the sector.

I claim: 1. In a printing mechanism, the combination with a type-carrying element pivotally carried on .a support and adaptedto coact with a platen, and

a rectifying member carried on the support and adapted to move with and independently thereof to engage and disengage said type-carrying element, 2. guide for the support in the path of movement of said rectifying member controlling the engagement and disengagement of the rectifying member with the type carrying element upon the movement of said support toward and from the platen.

2. In a printing mechanism, the combination with a type carrier, and a rectifying member engageable with and movably mounted in relation thereto, a support on which the type carrier is pivotally mounted constituting an operative means for the type carrier and rectifying member, a combined support guide and engageable member, said rectifying member being carried by said support and engageable with the guide for engagement with the type carrier in one direction of movement of the support.

3. In a printing mechanism, the combination with a type carrier, a support on which the type carrier is pivotally carried, and a rectifying member movably mounted in relation thereto, of a combined 'guide and engageable member for guiding the support in its path of movement and for causing movement of said rectifying member with respect thereto.

4. In a printing mechanism, the combination with a type carrier, and a rectifying member movably mounted in relation thereto, a support on which the type carrier is pivotally mounted constituting an operative means for the type carrier and rectifying member, a combined support guide and engageable member, said rectifying member being carried by said support and engaged with the type carrier under the control of the guide.

5. In a printing mechanism, the combination with a type carried pivotally carried on a support, and a rectifying member engageable with the type carrier and movably mounted in relation to said type carrier and support, av support guide in the path of movement of said rectifying member limiting its movement in either direction of movement of said support for causing the engagement and disengagement of the rectifying member with the type carrier.

6. In a printing mechanism, the combination with a type carrier pivotally carried on a. support, and a rectifying member engageable with thetype carrier and movably mounted in relation to said support, and guide means for the support and arresting the movement of the rectifying member for engagement with the type carrier while said rectifying member and carrier are being advanced by the support.

7. A printing unit of the character described, comprising in combination, a platen, a support, a sector having type characters thereon pivotally carried on said, support and adapted to be positioned into printing position with the platen, a rectifying member carried for movements with and independently of said support, a guide for the support, said rectifying member adapted to engage the guide to retain the sector with the selected type thereon in printing position with the platen upon movement of said support toward the platen and to engage the guide for effecting its disengagement with the sector upon movement of the support away from the platen.

MAX GARBELL. 

